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Just a sanity check before I spend a bunch of time building this...

Attached is a circuit diagram I did up for a grid of bipolar
electromagnetic indicators, also known as dot-flip displays, that I want
to build. The attached grid is a 3x3, but what I will actually build
will be 56*13

Electrically speaking you apply a roughly 12V pulse of a few ms in
either direction. This magnetises two bits of ferrite which hold the
colored dot in either orientation, yellow side up, or black side up.

I just want to make sure my multiplexing scheme will actually work, and
is the simplest possible solution, never done multiplexing before with
anything other than leds. Of course, the high-side FETs will have to be
PMOS, but other than that I can't think of any gotchas.

- -- 
http://petertodd.org 'peter'[:-1]@petertodd.org 
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